Wristwatch case



FIG. 1 is a perspective view of a wristwatch case showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a left side elevational view;

FIG. 6 is a bottom plan view; and,

FIG. 7 is a rear elevational view thereof.

The broken line showings of hands in FIGS. 1 and 2 are environmental only, and form no part of the claimed design. 

The ornamental design for a wristwatch case, as shown. 